#Question id: 361
#XL - Q Biochemistry
Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.
#Question id: 362
#XL - S Microbiology
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?
#Question id: 362
#XL - Q Biochemistry
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance?
#Question id: 363
#XL - S Microbiology
What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)
#Question id: 363
#XL - Q Biochemistry
What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)
#Question id: 364
#XL - S Microbiology
A solution contains 0.0000001 (10-7) moles of hydrogen ions [H+] per liter. Which of the following best describes this solution?